Journal
NATURE COMMUNICATIONS
Volume 9, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-018-04736-1
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Funding
- the Swedish Foundation for Strategic Research [ICA14-0018]
- Ragnar Soderberg Foundation
- Swedish Research council [2016-03354]
- European Research council [ERC-2017-StG-757733]
- Finnish Cultural Foundation
- Wenner-Gren Foundation
- Swedish Foundation for Strategic Research (SSF) [ICA14-0018] Funding Source: Swedish Foundation for Strategic Research (SSF)
- Swedish Research Council [2016-03354] Funding Source: Swedish Research Council
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Strong coupling between light and matter leads to the spontaneous formation of hybrid light-matter states, having different energies than the uncoupled states. This opens up for new ways of modifying the energy landscape of molecules without changing their atoms or structure. Heavy metal-free organic light emitting diodes (OLED) use reversed intersystem crossing (RISC) to harvest light from excited triplet states. This is a slow process, thus increasing the rate of RISC could potentially enhance OLED performance. Here we demonstrate selective coupling of the excited singlet state of Erythrosine B without perturbing the energy level of a nearby triplet state. The coupling reduces the triplet-singlet energy gap, leading to a four-time enhancement of the triplet decay rate, most likely due to an enhanced rate of RISC. Furthermore, we anticipate that strong coupling can be used to create energy-inverted molecular systems having a singlet ground and lowest excited state.
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